This document contains an unsolved chemistry practice paper from 2008 for IITJEE (Indian Institute of Technology Joint Entrance Examination). It has four sections testing different chemistry concepts through multiple choice questions. Section I has 9 objective questions testing concepts like IUPAC names, compound identification, hybridization, and solubility products. Section II has 4 reasoning questions requiring understanding of statements. Section III has 3 linked comprehension questions about reaction mechanisms. Section IV contains 3 matrix-match questions testing relationships between concepts.

1. IITJEE –Past papers CHEMISTRY - UNSOLVED PAPER - 2008

2. SECTION – I Straight Objective Type This section contains 9 multiple choice questions. Each question has 4 choices (A), (B), (C) and (D), out of which ONLY ONE is correct.

3. 01 Problem The IUPAC name of [Ni(NH3)4][NiCl4] is Tetrachloronickel (II) – tetraamminenickel (II) Tetraamminenickel (II) – tetrachloronickel (II) Tetraamminenickel (II) – tetrachloronickelate (II) Tetrachloronickel (II) – tetraamminenickelate (0)

4. Problem 02 Among the following the coloured compound is CuCl K3[Cu(CN)4] CuF2 [Cu(CH3CN)4]BF4

5. Problem 03 Both [Ni(CO)4] and [Ni(CN)4]2− are diamagnetic. The hybridization of nickel in these complexes, respectively, are sp3, sp3 sp3, dsp2 dsp2, sp3 dsp2, dsp2

6. Problem 04 Among the following, the surfactant that will form micelles in aqueous solution at the lowest molar concentration at ambient conditions is CH3(CH2)15N+(CH3)3Br− CH 3(CH 2) OSO 3 −Na+ CH3(CH2)6COO−Na+ CH3(CH2)11N+(CH3)3Br−

7. Problem 05 Solubility product constant (KSp) of salts of types MX, MX2 and M3X at temperature ‘T’ are 4.0 × 10−8, 3.2 × 10−14 and 2.7 × 10−15, respectively. Solubility's (mole dm−3) of the salts at temperature ‘T’ are in the order MX > MX2 > M3X M3X > MX2 > MX MX2 > M3X > MX MX > M3X > MX2

8. Problem 06 Electrolysis of dilute aqueous NaCl solution was carried out by passing 10 milli ampere current. The time required to liberate 0.01 mol of H2 gas at the cathode is (1 Faraday = 96500 C mol−1) 9.65 × 104 sec 19.3 × 104 sec 28.95 × 104 sec 38.6 × 104 sec

9. Problem 07 Cellulose upon acetylating with excess acetic anhydride/H2SO4 (catalytic) gives cellulose triacetate whose structure is a. b. c. d.

10. Problem 08 In the following reaction sequence, the correct structures of E, F and G ar a. b. c. d.

11. Problem 09 The correct stability order for the following species is (II) > (IV) > (I) > (III) (I) > (II) > (III) > (IV) (II) > (I) > (IV) > (III) (I) > (III) > (II) > (IV)

12. SECTION – II Reasoning Type This section contains 4 reasoning type questions. Each question has 4 choices (A), (B), (C) and (D), out of which ONLY ONE is correct.

13. Problem 10 STATEMENT-1: The geometrical isomers of the complex [M(NH3)4Cl2] are optically inactive. and STATEMENT-2: Both geometrical isomers of the complex [M(NH3)4Cl2] possess axis of symmetry. STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is correct explanation for STATEMENT-1 STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1 STATEMENT-1 is True, STATEMENT-2 is False STATEMENT-1 is False, STATEMENT-2 is TrueE

14. Problem 11 STATEMENT-1: [Fe(H2O)5NO]SO4 is paramagnetic. and STATEMENT-2: The Fe in [Fe(H2O)5NO]SO4 has three unpaired electrons. STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is correct explanation for STATEMENT-1 STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1 c. STATEMENT-1 is True, STATEMENT-2 is False d. STATEMENT-1 is False, STATEMENT-2 is True

15. Problem 12 STATEMENT-1: Aniline on reaction with NaNO2/HCl at 0oC followed by coupling with β-naphthol gives a dark blue coloured precipitate. and STATEMENT-2: The colour of the compound formed in the reaction of aniline with NaNO2/HCl at 0oC followed by coupling with β-naphthol is due to the extended conjugation. STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is correct explanation for STATEMENT-1 STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1 STATEMENT-1 is True, STATEMENT-2 is False STATEMENT-1 is False, STATEMENT-2 is TrueE

16. Problem 13 TATEMENT-1: There is a natural asymmetry between converting work to heat and converting heat to work. and STATEMENT-2: No process is possible in which the sole result is the absorption of heat from a reservoir and its complete conversion into work. STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is correct explanation for STATEMENT-1 STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1 STATEMENT-1 is True, STATEMENT-2 is False STATEMENT-1 is False, STATEMENT-2 is True

17. SECTION – III Linked Comprehension Type This section contains 2 paragraphs. Based upon each paragraph, 3 multiple choice questions have to be answered. Each question has 4 choices (A), (B), (C) and (D), out of which ONLY ONE is correct..

18. Paragraph for Question Nos. 14 to 16 A tertiary alcohol H upon acid catalysed dehydration gives a product I. Ozonolysis of I leads to compounds J and K. Compound J upon reaction with KOH gives benzyl alcohol and a compound L, whereas K on reaction with KOH gives only M,

19. Problem 14 Compound H is formed by the reaction of] a. b. c. d.

20. Problem 15 The structure of compound I is a. b. c. d.

21. Problem 16 The structures of compounds J, K and L, respectively, are PhCOCH3, PhCH2COCH3 and PhCH2COO−K+ PhCHO, PhCH2CHO and PhCOO−K+ PhCOCH3, PhCH2CHO and CH3COO−K+ PhCHO, PhCOCH3 and PhCOO−K+

22. Paragraph for Question Nos. 17 to 19 In hexagonal systems of crystals, a frequently encountered arrangement of atoms is described as a hexagonal prism. Here, the top and bottom of the cell are regular hexagons and three atoms are sandwiched in between them. A space-filling model of this structure, called hexagonal close-packed (HCP), is constituted of a sphere on a flat surface surrounded in the same plane by six identical spheres as closely as possible. Three spheres are then placed over the first layer so that they touch each other and represent the second layer. Each one of these three spheres touches three spheres of the bottom layer. Finally, the second layer is covered with a third layer that is identical to the bottom layer in relative position. Assumer radius of every sphere to be ‘r’.

23. Problem 17 The number of atoms on this HCP unit cell is 4 6 12 17

24. Problem 18 The volume of this HCP unit cell is a. b. c. d.

25. Problem 19 The empty space in this HCP unit cell is 74% 47.6% 32% 26%

26. SECTION – IV (Total Marks) Matrix-Match Type This contains 3 questions. Each question contains statements given in two columns which have to be matched. Statements (A, B, C, D) in column I have to be matched with statements (p, q, r, s) in column II. The answers to these questions have to be appropriately bubbled as illustrated in the following example. If the correct match are A-p, A-s, B-r, C-p, C-q and D-s, then the correctly bubbled 4 × 4 matrix should be as follows:

27. Problem 20 Match the compounds in Column I with their characteristic test(s)/ reaction(s) given in Column II. Indicate your answer by darkening the appropriate bubbles of the 4 × 4 matrix gives in the ORS. Column I Column II a (p) sodium fusion extract of the compound gives Prussian blue colour with FeSO4 (q) gives positive FeCl3 test (r) gives white precipitate with AgNO3 (s) reacts with aldehydes to form the corresponding hydrazone derivative

28. Problem 21 Match the entries in Column I with the correctly related quantum number(s) in Column II. Indicate your answer by darkening the appropriate bubbles of the 4 × 4 matrix given in the ORS. Column I Column II Orbital angular momentum of (p) Principal quantum number the electron in a hydrogen-like atomic orbital (B) A hydrogen-like one-electron wave (q) Azimuthal quantum number functional on obeying Pauli principle (C) Shape, size and orientation of hydrogen (r) Magnetic quantum number -like atomic orbital‘s (D) Probability density of electron at the (s) Electron spin quantum number nucleus in hydrogen-like atom

29. Problem 22 Match the conversions in Column I with the type(s) of reaction(s) given in Column II. Indicate your answer by darkening the appropriate bubbles of the 4 × 4 matrix given in the ORS. Column I Column II PbS -> PbO (p) roasting 3 CaCO -> CaO (q) calcination ZnS -> Zn (r) Carbone réduction 2 Cu S -> Cu (s) self reduction

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